Professional Active Calcium Powder Ultrafine Grinding Mill Manufacturer | Process Flow of Active Calcium Powder Production

Active calcium powder is also called compound calcium carbonate. The so-called compound calcium carbonate products usually refer to the heavy calcium carbonate as the main body (>50%), with a certain proportion of light calcium carbonate powder, through the compound modification technology, the light and heavy calcium are mixed and modified, which can well balance the difference between light and heavy calcium, and have the advantages of both. It can greatly reduce the cost of products, expand the application scope of products and improve the quality of products. HCMilling(Guilin Hongcheng) is a large-scale manufacturer of activated calcium ultrafine grinding mill in the industry. The production equipment of active calcium powder produced by us has been widely used in the market and has a good reputation. The following is a brief introduction to the production process of active calcium powder.

HLMX active calcium powder ultrafine vertical roller mill 

Production process of active calcium powder:

1. Based on the dry production process of heavy calcium carbonate, the following two processes can be used to compound active calcium carbonate:

★ First, grind the heavy calcium and light calcium with certain particle size and proportion → modify → grade;

★ Second, use heavy calcium and light calcium to grind → grade → modify.

Its characteristics are: simple process, small equipment investment, direct packaging after discharging, especially suitable for the modification of calcium carbonate by coupling agents.

2. Based on the wet production process of heavy calcium carbonate, the following process can be used to compound active calcium carbonate: wet grinding of slurry with heavy calcium and light calcium adjusted to a certain concentration → modification → slurry product → drying → dry powder product.

Its characteristics are as follows: wet activation is to treat calcium carbonate particles in the liquid phase, which can evenly coat calcium carbonate. Surfactants can be fully dispersed on the surface of calcium carbonate particles through steric effect and double electric layer effect, which increases the distance between particles. In the process of dehydration and drying, it can reduce the secondary agglomeration of particles. The dried product has fine particle size, small bulk density, good fluidity and dispersion.

Key points of active calcium powder production:

In order to produce high-quality compound activated calcium carbonate to meet the needs of downstream users, the following points should be noted:

(1) Select high-quality raw materials

Raw materials with high whiteness and low impurities shall be selected for calcite and limestone, and the magnesium oxide content in the ore shall be controlled, with the magnesium oxide content below 0.5% as the best. Low magnesium oxide content can reduce the pH value and oil absorption value of the powder.

(2) Optimize the proportion and particle size range of heavy calcium and light calcium

It can effectively improve the surface quality of products while effectively improving the fluidity of rubber.

(3) Strictly control the material of equipment used in powder processing

Generally, stainless steel shall be used to avoid impurities such as rust from mixing into the product. In particular, the activation equipment and drying equipment must be made of stainless steel to avoid rusting due to contact with the active agent (generally slightly acidic); The wet materials contacted by the drying equipment are easy to rust the carbon steel equipment.

(4) Surface coating technology of calcium carbonate powder

When the surface is coated (the amount of coating agent is insufficient), the lipophilicity of the powder will be reduced, and the compatibility with the plasticizer will be reduced. It is necessary to ensure that calcium carbonate gets a high degree of activation after being coated with the surfactant.

HCMilling(Guilin Hongcheng) Grinding Mill Company, as the manufacturer of active calcium powder ultrafine grinding mill, has widely applied the production equipment of active calcium powder such as HC series active calcium powder Raymond mill, HCH active calcium powder ultrafine ring roller mill, HLMX active calcium powder ultrafine vertical roller mill in the process of active calcium powder production, and has rich experience in customer cases and project supporting schemes. If you have a purchase demand for active calcium powder production equipment, please contact mkt@hcmilling.com or call at +86-773-3568321, HCM will tailor for you the most suitable grinding mill program based on your needs, more details please check www.hcmilling.com.